TGR's most prolific steam design was
the Beyer, Peacock colonial Mogul which became the 'C' class. Construction
of the 28 examples spanned the period 1885 - 1908. To improve their capacity
and operation, ten locos were rebuilt: six 'CC' with enlarged Belpaire boilers
(1912-16) and four (CCS) with a superheated Belpaire boiler, new cylinders
and outside Walschaerts valve gear (1924-28).

The last 'CCS' in TGR service was CCS23 - it was also the first ex-TGR
loco to steam in preservation. The loco was never withdrawn: it slipped into
preservation by being associated with Don River Railway's early efforts to
set up their own railway. A few scenes from the Mongrel Mogul's latter day
escapades